JP4660807B2 - Vibration control structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration control structure for a building.
[0002]
[Prior art]
As the number of vibration sources such as road traffic increases and the building becomes taller, vibrations are likely to occur everywhere, resulting in a problem that workability and comfort in the building are significantly impaired. In addition, since buildings are greatly vibrated when an earthquake occurs with an increase in the number of layers, in order to reduce these vibrations, various types of vibration control (seismic isolation) structures have been applied to recent buildings.
[0003]
4A and 4B are diagrams showing an example of a conventional vibration damping structure. FIG. 4A is a plan view and FIG. 4B is a side sectional view. As shown in this figure, the building J includes a core portion 41, a general portion 42 surrounding the core portion 41, and a damper portion 43 interposed between the core portion 41 and the general portion 42. Yes. The core part 41 and the general part 42 have different deformation characteristics (vibration characteristics). As described above, the building J is divided into blocks having different vibration characteristics (that is, the core portion 41 and the general portion 42), and the damper portion 43 is provided between these blocks. J has a structure that absorbs vibration energy.
[0004]
[Problems to be solved by the invention]
Although the above-described vibration damping structure can surely absorb the vibration energy at the time of earthquake occurrence, its absorption effect is insufficient. In particular, when an earthquake having a wide range of vibration frequencies occurs, a sufficient vibration damping effect cannot be obtained. Moreover, since the building J has to be classified into blocks having different vibration characteristics, the design burden is large. In the future, considering a further increase in the height of the building, it is necessary to efficiently construct a damping structure having a higher vibration damping effect.
[0005]
This invention is made | formed in view of such a situation, and it aims at providing the damping structure which can suppress the vibration which acts on a building effectively.
[0006]
[Means for Solving the Problems]
In order to solve the above-described problem, the vibration damping structure of the present invention is a vibration damping structure for a building, and the building is divided into a core part and a non-core part, and a part of the building Is a low-rigidity portion that is constituted by a narrow column portion that is thinner than the column portions that constitute the core portion and the non-core portion, and has a lower horizontal rigidity than other portions, and the low-rigidity portion of the building A damper portion is provided in a portion other than the portion provided with.
[0007]
According to the present invention, by providing a low-rigidity part in a part of a building and providing a damper part in another part, the rigidity of the low-rigidity part and the damping characteristic of the damper part can be adjusted to achieve a desired vibration damping. The characteristic can be obtained and a sufficient vibration damping effect can be obtained. Moreover, since a low-rigidity part should just be provided in a part of building, a damping structure can be constructed | assembled efficiently. Furthermore, since the low-rigidity part is configured by a narrow column part that is thinner than the column part that constitutes the core part and the non-core part, the low rigidity part can be reduced by simply selecting the material and thickness of the thin column part. The rigidity of the rigid part can be set arbitrarily. Therefore, the damping characteristic can be changed efficiently.
[0008]
Since the building is divided into a core part and a non-core part, the low-rigidity part and the damper part are interposed between the core part and the non-core part. The non-core portion can obtain a sufficient damping effect while being supported by the core portion.
[0009]
The low-rigidity part is disposed above and below the non-core part to support the non-core part, and the damper part is disposed between the side part of the non-core part and the core part. In this case, the vibration in the horizontal direction is sufficiently reduced in a state where the non-core portion is stably supported in the vertical direction by the low-rigidity portion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The vibration damping structure of the present invention will be described below with reference to the drawings. Fig.1 (a) is a front view which shows one Embodiment of the damping structure of this invention.
In FIG. 1A, a building S includes a non-core portion 1, a core portion 2 disposed on both sides thereof, a damper portion 3 interposed between the non-core portion 1 and the core portion 2, and A low-rigidity portion (thin column portion) 4 is provided.
[0012]
The non-core part 1 has a plurality of column parts 5, and the non-core part 1 as a whole has a predetermined rigidity. The core part 2 also has a plurality of column parts 6, and the core part 2 as a whole has a predetermined rigidity. Here, the rigidity of the non-core part 1 and the rigidity of the core part 2 are set to be substantially the same.
[0013]
The non-core portion 1 is disposed at a substantially central portion of the building S. The core part 2 is arrange | positioned at the both sides of this non-core part 1, and has the side wall part 2a and the ceiling part 2b. The lower end of the side wall 2a is fixed to the ground.
[0014]
The low-rigidity portion 4 is configured by narrow column portions 4A and 4B that are thinner than the column portions 5 and 6 constituting the non-core portion 1 and the core portion 2. The low-rigidity part 4 is disposed on the upper and lower parts of the non-core part 1 and supports the non-core part 1. That is, the low rigidity part 4 is provided in the uppermost part and the lowest part among the side walls (outer peripheral parts) 2a of the building S.
Among these, the narrow pillar part 4 </ b> A arranged at the lower part of the non-core part 1 has a lower end fixed to the ground and an upper end connected to the non-core part 1. On the other hand, the narrow pillar part 4 </ b> B arranged on the upper part of the non-core part 1 has a lower end connected to the non-core part 1 and an upper end connected to the ceiling part 2 b of the core part 2.
[0015]
The damper part 3 is arrange | positioned among the structures S except the part in which the low-rigidity part 4 is provided. In the present embodiment, the damper portion 3 is provided so as to connect between the side portion 1 a of the non-core portion 1 and the side wall portion 2 a of the core portion 2. As the damper part 3, a steel damper, an oil damper, etc. can be used, for example.
[0016]
The low-rigidity part 4 that is configured by a plurality of thin columnar parts 4A and 4B and is provided on the upper and lower parts of the non-core part 1 has a horizontal rigidity, and the low-rigidity part 4 is provided in the building S. It is set so that it may become lower than parts other than being, ie, the non-core part 1 and the core part 2. FIG. That is, by making the thickness and material of the thin pillar portions 4A and 4B constituting the low rigidity portion 4 different from those of the pillar portions 5 and 6 constituting the non-core portion 1 and the core portion 2, the entire horizontal direction of the low rigidity portion 4 is changed. The rigidity is reduced. On the other hand, the rigidity in the longitudinal direction of the thin column portions 4A and 4B, that is, the rigidity in the vertical direction of the entire low-rigidity portion 4 is high, and has sufficient strength to support the non-core portion 1.
[0017]
Next, the action when the building S having the above-described structure vibrates will be described with reference to FIG. FIG.1 (b) is a figure which shows the shape change of the building S when an earthquake generate | occur | produces with respect to the structure S shown to Fig.1 (a).
[0018]
In a normal state (a state in which no earthquake occurs), as shown in FIG. 1A, the non-core portion 1 includes the narrow column portions 4A and 4B and the core portion having sufficient strength in the vertical direction. 2 is stably supported.
[0019]
When an earthquake occurs and a vibration acts on the building S, the building S is deformed as shown in FIG. That is, when an earthquake occurs and a large horizontal movement (rolling) is applied to the building S, the thin column portions 4A and 4B having reduced horizontal rigidity are obtained as shown in FIG. Distorted diagonally. At the same time, the distance between the side portion 1a of the non-core portion 1 and the side wall portion 2a of the core portion 2 changes, and each of the plurality of damper portions 3 provided around the non-core portion 1 is deformed. Due to the deformation of the damper portion 3 and the displacement of the low-rigidity portion 4, vibrations acting on the building S are reduced.
[0020]
When it is desired to improve the vibration suppression characteristics for a predetermined vibration frequency band, for example, when it is desired to improve the vibration suppression performance for low frequency components, the rigidity in the horizontal direction of the narrow column portions 4A and 4B is set low. . On the other hand, when it is desired to maintain a certain degree of rigidity for the entire building S, the rigidity in the horizontal direction of the narrow pillar portions 4A and 4B is set high. When changing the damping characteristics, the narrow pillars 4A and 4B may be replaced with thin ones or thick ones. Alternatively, the weight of the non-core part 1 may be changed. Furthermore, when it is desired to suppress the resonance peak, the damper unit 3 may be replaced with one having a different attenuation characteristic.
[0021]
As described above, the rigidity of the low-rigidity part 4 and the damping characteristic of the damper part 3 are adjusted by providing the low-rigidity part 4 in a part of the building S and providing the other-part damper part 3. Therefore, desired damping characteristics can be obtained, and a sufficient damping effect can be obtained.
[0022]
By providing the low-rigidity part 4 at the uppermost part and the lowermost part of the building S other than the outer peripheral part (side wall part 2a), the non-core part 1 and the core part 2 that are the central part of the building S The vibration which acts on can be reduced effectively.
[0023]
Further, the building S is divided into a non-core portion 1 and a core portion 2 on both sides of the non-core portion 1, and a damper portion 3 and a low-rigidity portion 4 are interposed between the non-core portion 1 and the core portion 2. Accordingly, the non-core portion 1 can obtain a sufficient vibration damping effect while being stably supported by the low-rigidity portion 4 and the core portion 2.
[0024]
Since the low-rigidity part 4 is constituted by the narrow pillar parts 4A and 4B that are thinner than the pillar parts 5 and 6 constituting the non-core part 1 and the core part 2, only the material and thickness of the fine pillar parts 4A and 4B are selected. Thus, the rigidity of the low rigidity portion 4 can be arbitrarily set. Therefore, the damping characteristic can be changed efficiently.
[0025]
In the above-described embodiment, the operation of the building S at the time of the occurrence of the earthquake has been described. However, the vibration control structure of the present invention has the same vibration damping effect against vibrations caused by road traffic and other vibration generation sources. Obtainable.
[0026]
Next, another embodiment of the vibration damping structure of the present invention will be described with reference to FIGS. Here, in the following description, the description of the same or equivalent components as those of the vibration damping structure described in FIG. 1 is simplified or omitted.
[0027]
In the structure S2 shown in FIG. 2, the core part 2 has a side wall part 2a, a ceiling part 2b, and a bottom part 2c, and the bottom part 2c is in contact with the ground. The non-core part 1 is arranged inside the core part 2. A low-rigidity portion (thin columnar portion) 4 is disposed above and below the non-core portion 1 disposed inside the core portion 2, and among these, the narrow column portion 4 </ b> A on the lower side of the non-core portion 1. Is connected to the bottom 2c of the core 2 at its lower end. A plurality of damper parts 3 are interposed between the side part 1 a of the non-core part 1 and the side wall part 2 a of the core part 2.
[0028]
Thus, in FIG. 2, the non-core part 1 is supported by the bottom part 2c of the core part 2 via the thin pillar part 4A. That is, the lower-side narrow pillar portion 4A that supports the non-core portion 1 as shown in FIG. 1 is connected to the ground, but the lower-side narrow pillar portion of the non-core portion 1 as shown in FIG. It can also be set as the structure connected to the core part 2 without connecting the part 4A to the ground.
[0029]
The structure S3 shown in FIG. 3 has two non-core parts 1 inside the core part 2.
And thin pillar part (low-rigidity part) 4A, 4B is provided in each upper part and lower part of the non-core part 1. FIG. As described above, the number of the non-core portions 1 is not limited to one and can be provided for a single building. That is, a part of the building is provided with a plurality of low-rigidity parts 4 having a lower horizontal rigidity than other parts, preferably at least at the uppermost and lowermost parts of the building, and the low-rigidity part 4 is provided. The damper part 3 should just be provided in several parts other than having.
[0030]
【The invention's effect】
As described above, by providing a low-rigidity part in a part of a building and providing a damper part in another part, the desired vibration damping can be achieved by adjusting the rigidity of the low-rigidity part and the damping characteristics of the damper part. Characteristics can be obtained, and a sufficient damping effect can be obtained as compared with the conventional damping structure. Moreover, since the structure itself is a simple structure, work efficiency can be improved in building construction.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing an embodiment of a vibration damping structure of the present invention.
FIG. 2 is a schematic configuration diagram showing another embodiment of the vibration damping structure of the present invention.
FIG. 3 is a schematic configuration diagram showing another embodiment of the vibration damping structure of the present invention.
FIG. 4 is a diagram for explaining a conventional vibration damping structure.
[Explanation of symbols]
1 Non-core part 2 Core part 2a Side wall part (outer peripheral part)
3 Damper part 4 Low rigidity part 4A, 4B Narrow pillar part S Building (damping structure)

Claims (3)

A vibration control structure of a building,
The building is divided into a core part and a non-core part,
A part of the building is a low-rigidity part constituted by a narrow pillar part that is thinner than the pillar part that constitutes the core part and the non-core part, and the rigidity in the horizontal direction is lower than other parts,
A damper structure having a damper portion provided in a portion of the building other than the low rigidity portion.   2. The vibration damping structure according to claim 1, wherein the low-rigidity part and the damper part are interposed between the core part and the non-core part. A vibration control structure of a building,
The building is divided into a core part and a non-core part,
A part of the building is a low-rigidity part that is configured by a narrow pillar part that is thinner than the pillar part that constitutes the core part and the non-core part, and has a lower rigidity in the horizontal direction than other parts,
At least a part of the low-rigidity part is provided with a lower end connected to the core part or the ground and an upper end connected to the non-core part,
A vibration damping structure, wherein a damper portion is provided in a portion of the building other than the low rigidity portion.

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